The flutes of a milling cutter are almost always helical. If the flutes were straight,
the whole tooth would impact the material at once, causing vibration and reducing accuracy
and surface quality.

Setting the flutes at an angle allows the tooth to enter the material gradually,
reducing vibration. Typically, finishing cutters have a higher rake angle (tighter helix)
to give a better finish.

– Flute Length:

The length from the outer corners of the cutting lips to the extreme back of the flutes.
Includes the sweep of the tool used to generate the flutes and therefore does not
indicate the usable length of flutes.

Committed to Quality at Norseman™ Drill &
Tool, begins with the finest tool steel we can buy and ends with the world class products in our product catalog. Our cutting tools are designed,
engineered and superbly crafted to provide long lasting durability.